The autofix for C413 can lead to bugs if the key parameter is used. Here is a little code example to show, that the results before and after the autofix are different.

original = [(1, 0), (2, 0), (3, 1), (4, 1)]
print(list(reversed(sorted(original, key=lambda x: x[1]))))
print(sorted(original, key=lambda x: x[1], reverse=True))

Here is the output:

[(4, 1), (3, 1), (2, 0), (1, 0)]
[(3, 1), (4, 1), (1, 0), (2, 0)]